897111321 has 4 divisors (see below), whose sum is σ = 1196148432. Its totient is φ = 598074212.

The previous prime is 897111217. The next prime is 897111349. The reversal of 897111321 is 123111798.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 897111321 - 2¹⁰ = 897110297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (897111121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149518551 + ... + 149518556.

It is an arithmetic number, because the mean of its divisors is an integer number (299037108).

Almost surely, 2^897111321 is an apocalyptic number.

It is an amenable number.

897111321 is a deficient number, since it is larger than the sum of its proper divisors (299037111).

897111321 is a wasteful number, since it uses less digits than its factorization.

897111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299037110.

The product of its digits is 3024, while the sum is 33.

The square root of 897111321 is about 29951.8166560895. The cubic root of 897111321 is about 964.4553186320.

The spelling of 897111321 in words is "eight hundred ninety-seven million, one hundred eleven thousand, three hundred twenty-one".